Molding-box.



witwassen W. COLLINS.

MOLDING vB0X. APPLICATION HLBD Julmlo, 19,07.

Patented Nov.3,190'8.

Waff

WILLIAM COLLINS, OF TIITON, ENGLAND.

MOLDING-BOX.

Specification of Letters Patent.

Patented Nov. 3, 1908.

Application filed June 10, 1907. Serial No. 378,323.

To all whom it may concern:

Be it known that I, IVILLIAM COLLLNS, a subject of the King of Great Britain, and a resident of Tipton, Staordshire, England, have invented certain Improvements in Molding Boxes, (for which I have been granted a patent in Great Britain, No. 14,837, dated June 30,1906 of which the following is a specification.

My invention relates to the construction of molding boxes for the production of repetition work, either hand or machine made, as used in foundries for manufacturing small castings in iron, brass, or other metals. Its construction facilitates the removal of the box from the mold when the sand has been rammed in to its required shape, thereby conducing to better results and occupying less time in the molding.

In describing the invention in detail, reference will be had to the accompanying` drawing, forming part of this specification, wherein like characters denote corresponding parts in the several views, in which- Figure l, illustrates the invention by a plan view partly in section. Fig. 2, illustrates a structural view of a fragment of the mold.

The box is of rectangular form and made in two parts a, b, the part a, fitting on top of part Z), as usual, but tapered from bottom to top. The top half a, of the box is provided with a groove or channel o, running along the interior of two of its oppositely facing sides, the said grooves c, terminating in openings at both ends of the box.

When the pattern has been laid, the mold is inclosed within the lower half of the tapersided box and the upper half fitted thereon. At this point the bolts CZ, are disposed within the grooves c, but by a sliding movement of the handles, the bolts move out of the grooves c, and project into the box along its full length. The sand to cover the upper half of the pattern is now rammed into the box until it becomes as one solid cohesive mass. The top half of the box is then raised, thereby lifting the upper half of the mold by the projecting bolts d, engaging in the grooves formed in the sand during its ramming in. The patterns are now removed, after which the part a, of the box, together with its inclosed mold, are placed in position and the casting made in the usual way.

'Ihe handles of the bolts are now mani pulated which causes the bolts `7) to dispose themselves in their grooves c, so that the interior sides of the box are clear of the sand mold, when the taper-sided box can be lifted therefrom.

The binder has the same internal form as the molding box and is placed round the sand molds after the molding box has been removed.

The bolts d, are made Hat in cross section and have two diagonally disposed ends j, engaging with diagonal openings in the ends of the box, so that a sliding movement of the bolts, results in a movement of the bolt transversely of the box into and out of the grooves in the box.

I claim:

A molding box having grooves in its inner faces and diagonally disposed openings in the ends, bolts adapted to move into and out. of said grooves, said bolts having ends diagonally disposed with relation to the intermediate portion of said bolt, said ends being slidable in the diagonal openings.

In witness whereof I have hereunto set my hand in presence of two witnesses.

WILLIAM COLLINS.

Vitnesses:

GEORGE T. MILLARD, FREDERICK MARSH. 

